Rümker plateau is composed of a series of overlapping
domes, lava flows and to a ring surrounding the central portion. The examined
domes on the Rümker plateau are typical mare domes morphometrically similar to
the class B1 domes, in the Hortensius/Milichius/T.
Mayer region, denoting steep flank slopes >2° (Rümker 1, 3 and 4), and B2,
representing domes with lower slopes.

Rheologic modelling results confirm that the domes
were produced by low effusion rates, possibly during the terminal phases of the
eruptions emplacing the plateau. The significant differences among the lava
viscosities inferred for the domes (from 104 to 106Pa s)
is not attributed to compositional effects due to the observed spectral
homogeneity but are more likely caused by different lava eruption temperatures
and degrees of crystallization.

The magma
reservoirs feeding the domes-forming eruption were located just below the lunar
crust (inferred dike lengths between 25 km for Rümker 5 to 89 km for Rümker 4) when a
crustal thickness of ~50 km is assumed for the Rümker region.